Safety fuse



Patented May 12, 19725.

ADDISON F. GEABHART, (3F

AC'DUNN, l.VEST VIRGINIA.

SAFETY FUSE.

Application filed Hay 5, i922.

To @ZZ whom t may concern:

Be it known that I; ADDISON F. Gunn- LHART, a citizen of the UnitedStates, residing at MacDunn, in the county of F ayettev and Stateoil/Vest Virginia, have invented new and .useful Improvements in SafetyF uses, of which. the following is a specitication.

This invention relates to safety appliances, particularly to fuses forinterposition in current carrying lines and has for its object theprovision orp a novel fuse device which instead of being attachedstationarily to a portion of the machinery with which it is associatedis interposed or connected in the cables and suspended thereby.

An important object is the provision of a device of this character whichis adapted for use in carrying current or" any strength desired andwhich is equally well adapted foruse vin connection with either directcurrent lines or alternating current systems.

Another object is the provision of a device of this character whichincludes a supporting block formed of separable sections between whichareclamped a plurality of similar terminals to which the fuse wires areattached, these terminals being let into the block so asto have a firmseat therein to provide the necessary strength to permit the device tobe used in suspended relation.

An additional object is the provision of a device of this characterwhich will be simple and inexpensive in manufacture, elticient anddurable in use, a. great safe guard to life and property, and a generalimprovement in the art.

VVith the above and other objects and advantages in view the inventionconsists in theV details of construction to be hereinafter more fullydescribed and claimed and illustrated in the accompanying drawings, inwhich:

Figure l is a plan view of the device,

Figure 2 is a plan view with one section of the block removed,

Figure 3 is a cross section on the line 3-3 of Figure'l,

Figure d is a cross section on the line 4`4 of Figure l and -Figure 5 isa section on the line 5 5 of Figure 1.

Referring more particularly to the drawings I have shown my device ascomprising a block 10 formed of suitable insulating Serial No. 558,816.

material and constructed in two similar sections il, held together bytransverse bolts l2 having their heads i3 recessed into one section andhaving their other ends carrying nuts let located within recesses 15 inthe other section. The nuts carry handle members 1GA by means oit whichthey may he rotated to effect assembling` or disassembling of the devicewithout the employ` ment of any tools.

The sections 11 are formed with a pluralit-y of spaced matingsemi-cylindrical longitudinally extending channels 17 near the ends ofwhich are formed rectangular recesses 18. Associated with each channelare two metallic terminal members each of which includes a rectangularhead 19 titting within the recess 18 and terminating in an extension 20.Carried by the entensions 20 of each pair of terminals are pins 2l towhich are secured the ends ot the fuse wire 22. The carrying capacity ofthe fuse wire must necessarily depend upon the nature of the currentused in driving the machinery with which my device is associated and thecapacity may be as great or as little as may be found desirable. Eachterminal further includes an elongated cylindrical extension 23project-ing beyond'the end of the block and formed with a socket 24 forthe reception of the current carrying wire 25 which is held in place asfor instance by means of a set screw 26.

Assuming that the device has been constructed and assembled as abovedescribed and as shown in the drawings, it is apparent that it willoperate electrically in the same manner as any other fuse but it is tobe noted that it possesses the great advantage of being capable otinterposition in the current carrying' cables of mining machines,electric locomotives, street railway cars and also in electric lightingor other systems. Owing to the fact that the various terminalsy are letor mortised into the sections of the block it is apparent that thedevice is capable of withstanding a severe endwise pull so that it maybe dragged along without causing any injury to the structure and withoutdanger of causing disconnection of any of the wires. It is to beobserved that the device is equally well adapted for use in taking careof alternating or direct current and that when used in connection withdirect current in case one fuse wire burns out the cables may beswitched to one of the 0 longitudinally into angular recesses, a

' Y remaining fuse Wires so that Whatever machinery is protected by thedevice may' b e Y continued in operation Without anyappreci-Y abledelay. Y Y

Fronithe, foregoing description and a studyof theV drawings it will beapparent that I have thus provided an extremely simple and consequentlyinexpensive safety fuse for alltypes of currents and in which reneWal'ofa burnt out fuseV maybe accomplishedin a very easy manner Sand Withoutthe employment of any :tools Whatever. As the device is "so simple it isVapparent that there is nothing `to get out of `order and thatitsh'ouldlthus zhave alonglife `and satisfac- Asections detachablysecured together, said 'sections being formed Withspaced parallelextending semicylindrical leading .near their ends 'mating 'passagespair of Vterminals VV1,537,296 Y associatedk with each ypassage:andiincl'uding Y an angular head engaged Within the angu-V Y' larrecesses and further including a reduced extension projecting beyondthe'end of the j' block for connectionwith current carrying Wires, andafuse Wire connected With each pair of terminal members.y

2. A device of the character described comprising a block formed insections detachably secured together, said blockV being formed kofinsulating material and having each section Iprovided with alongitudinal y channel of semi-'cylindrical formation, the

channels mating to define a cylindrical bore, Y

the block being formed at the ends 'offthe bore with yangular recessesfrnating'to define sockets, terminals held between-the sections of theblock'and'eacli formed With an angular head enga-ged Withinnthe socketand A further formed with a 'reduced plate like tongue ventering thebore and carrying a securing element, Veach terminal lmember furtherhaving an outwardly extending portion projecting beyond -the end of theblock and having a Wire receiving socket inter- 'sected by `a clampingscrew 'for yeffectingV connection, `and a fusel Wire extendingWlithinthe bore with `its ends Wrappedeabout said securing elements.

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InA testimony whereof I yailix my signaf n MDD130s;per;Annan-T. H

